Stefan Kleijkers <stefan <at> unilogicnetworks.net> writes:
>
> Hello,
>
> Yes that's no problem. I'm using that configuration for some time now.
> Just generate a config with multiple OSD clauses with the same node/host.
>
> With the newer ceph version mkcephfs is smart enough to detect the osd's
> on the same node and will generate a crushmap whereby the objects get
> replicated to different nodes.
>
> I didn't see any impact on the performance (if you have enough
> processing power, because you need more of that).
>
> I wanted to use just a few OSD's per node with mdraid, so I could use
> RAID6. This way I could swap a faulty disk without bringing the node
> down. But I couldn't get it stable with mdraid.
>
This is how my OSD part in ceph.conf looks like
[osd.0]
host = ceph-node-1
btrfs devs = /dev/sda6
[osd.1]
host = ceph-node-2
btrfs devs = /dev/sda6
[osd.2]
host = ceph-node-3
btrfs devs = /dev/sda6
[osd.3]
host = ceph-node-4
btrfs devs = /dev/sda6
Can you please help me how I can add multiple OSD in the same machine
considering that i have 4 partition created for OSD ?
I have powerful machines having 6 quad core Intel Xeon with 48G of RAM
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